Pulmonary filter



FIg. 1 is a top isometric view of a pulmonary filter, showing my new design;

FIG. 2 is a side elevational view thereof, with all other sides being identical to that shown;

FIG. 3 is a bottom isometric view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a pulmonary filter, as shown and described. 